In this latest newsletter, he highlights pundits who disagree, including Robert J. Samuelson, Samuelson says Reeves has it almost backward, the upper-middle class are setting a good model for society to aspire to:

Reeves has the story almost backward. As a society, we should try not to restrict the upper middle class, but to expand it. In general, it’s doing what we ought to want the rest of society to do. Its marriage rates are higher, its out-of-wedlock births are lower, its education levels are higher. As for parents, why make them feel guilty for wanting to help their children? What are parents for, after all?

I think there is a straightforward reconciliation to their two positions, and it is already embedded, I think, in Reeves model. The problem being that the UMC may disproportionately enjoy these traits in their own orbits, but exclusionary housing policies, and the leveraging of networks, prevent them from migrating to less privileged groups.